CN219837662U - Clamp spring and compact clamp with same - Google Patents

Abstract

The utility model belongs to the technical field of clamps, and discloses a clamp spring, wherein one end of the clamp spring is provided with an external thread; one end of the clamp spring, which is far away from the external thread, is provided with a plurality of adjacent and evenly distributed attaching petals. The utility model can be closed inwards under the condition of external force so as to realize the gripping of the workpiece passing through the device. The utility model also discloses a compact clamp with the clamp spring.

Description

Clamp spring and compact clamp with same

Technical Field

The utility model belongs to the technical field of clamps, and particularly relates to a clamp spring and a compact clamp with the clamp spring.

Background

Generally, the workpiece requires a large clamping force to meet specific processing requirements. However, because of the space limitations of the field device, a large diameter piston cannot be used to provide a large clamping force to the clamp, and therefore, compressed air is used instead of the large diameter piston in order to avoid the space limitations of the device.

However, this brings a new problem that the compressed air pressure in the field is small, and the clamping requirement on the workpiece cannot be met stably.

Disclosure of Invention

In order to solve the technical problems, the utility model discloses a clamp spring which can be closed inwards under the condition of external force so as to grasp a workpiece passing through the clamp spring. The utility model also discloses a compact clamp with the clamp spring.

The specific technical scheme of the utility model is as follows:

one end of the clamping spring is provided with an external thread;

the middle part of the clamp spring is provided with a plurality of attaching petals which are uniformly distributed at intervals; or (b)

One end of the clamp spring, which is far away from the external thread, is provided with a plurality of adjacent and evenly distributed attaching petals.

The attachment flaps are extruded from the outer sides of the clamp springs, so that the attachment flaps can be folded towards the inner sides of the clamp springs, and the workpiece is gripped by the attachment flaps on the basis that the workpiece passes through the clamp springs.

Preferably, the external diameter of the mating flap tapers from an end distal to the external thread to an end proximal to the external thread.

The outer circle of the attachment flap is approximately conical, so that the attachment flap can be folded by sliding the clamp spring towards the external thread under the condition of contacting the attachment flap, and the workpiece can be gripped.

A compact clamp comprises a clamp spring as described above.

When the clamp spring is arranged on the clamp, the clamp can be used for well grasping a workpiece, so that the workpiece processing requirement is met.

Preferably, the method further comprises:

the inner cone is provided with an inclined plane matched with the fitting valve; and

the displacement assembly is in threaded connection with the clamp spring and is used for driving the clamp spring to move along the axial direction of the inner cone, so that a plurality of fitting petals can be opened or closed simultaneously.

The position of the inner cone is relatively fixed, so that when the displacement assembly moves relative to the inner cone, the displacement assembly carries the clamp spring to move, and extrusion of the fitting valve is realized by utilizing the inclined plane under the condition that the inclined plane contacts the fitting valve, so that the fitting valve is folded, and is opened on the contrary.

Preferably, the method further comprises:

a housing assembly having a space for receiving the inner cone and the displacement assembly therein;

the inner cone is fixedly arranged in the seat body assembly, and the displacement assembly is movably arranged in the seat body assembly;

the seat body component is provided with a first medium channel and a second medium channel which are used for leading in mediums towards different directions, so that the displacement component generates displacements relative to the seat body component in different directions.

The seat body assembly can accommodate the inner cone and the displacement assembly to form a complete clamp, and on the basis, the first medium channel and the second medium channel are utilized to introduce media from different directions, so that the media push the displacement assembly to move towards different directions, and the clamp spring and the inner cone move relatively, so that the attached valve is folded or unfolded.

Preferably, the seat assembly includes:

a base having a short diameter portion;

the intermediate body is sleeved on the short-diameter part; and

the end cover is sleeved at one end of the end cover, is arranged outside one end of the inner cone, which is provided with the inclined surface, and the other end of the end cover cooperates with the intermediate body, so that one end of the inner cone, which is far away from the inclined surface, is clamped between the end cover and the intermediate body;

a first sliding space is formed between the intermediate body and the base, and a third sliding space is formed between the inner cone body and the intermediate body;

the first medium channel and the second medium channel are both communicated to the first sliding space;

the displacement assembly has sliding capacity in the first sliding space and the third sliding space.

In order to ensure the activity of the displacement assembly, the displacement assembly can be pushed in the first sliding space and the third sliding space through a medium, so that the movement requirement of the clamp spring is met.

Preferably, the displacement assembly comprises:

the first piston is sleeved on the short-diameter part and is positioned in the first sliding space;

the connecting sleeve is provided with a threaded part and a connecting part, the threaded part is connected with the clamp spring, and the connecting part is positioned in the third sliding space; and

and one end of the fixing component is connected with the first piston, and the other end of the fixing component is connected with the connecting part.

The medium can drive the first piston to move the clamp spring respectively, so that the laminating valve can be folded or unfolded better.

Preferably, a second sliding space is formed between the end cover and the inner cone; the first medium channel and the second medium channel are communicated with the first sliding space and/or the second sliding space; the displacement assembly also has a sliding capability within the second sliding space.

The displacement assembly can meet the pushing requirement of the medium from two positions, so that the movement of the clamp spring is more stable.

Preferably, the displacement assembly further comprises:

the second piston is sleeved at one end of the inner cone, which is provided with an inclined plane, and is positioned in the second sliding space;

one end of the fixing component is connected with the first piston, and the other end of the fixing component penetrates through the connecting part and is connected with the second piston.

The displacement assembly is made to form a double-piston structure, so that the movement requirement of the clamp spring is better met.

Preferably, the fixing assembly includes:

a bush passing through the connection portion, one end of the bush being in contact with the first piston, and the other end being in contact with the second piston;

a nut located at the second piston; and

and one end of the screw extends into the bushing from the first piston, passes through the second piston and is connected with the nut.

The first piston and the second piston are connected together through the bushing, the nut and the screw, so that the requirement of integral movement is met.

Compared with the prior art, the clamping device can improve larger clamping force for the workpiece, and meets the grasping requirement under the condition that the diameter of the clamp and the pressure of an input medium cannot be increased; the utility model has low use condition, can generate large holding force on the workpiece by utilizing an air source or hydraulic pressure, and is not only suitable for finish machining, but also suitable for rough machining; in addition, in some special apparatuses, the compact structure of the present utility model can be applied to special apparatuses for processing shaft-type parts such as gear shafts and the like because of the large limitation of the inner space thereof and the multiple pistons.

Drawings

FIG. 1 is a schematic view of a snap spring according to one embodiment of the present utility model;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of a clamp not clamping a workpiece in accordance with one embodiment of the utility model;

FIG. 4 is a schematic view of a clamp holding a workpiece in accordance with one embodiment of the utility model;

FIG. 5 is a schematic view of a snap spring according to another embodiment of the present utility model;

FIG. 6 is a cross-sectional view of FIG. 5;

FIG. 7 is a schematic view of a clamp not clamping a workpiece in accordance with another embodiment of the utility model;

fig. 8 is a schematic view of a clamp holding a workpiece in accordance with another embodiment of the utility model.

In the figure: 1-clamping springs; 2-external threads; 3-attaching the valve; 4-an inner cone; 5-a first media channel; 6-a second media channel; 7-a base; 8-an intermediate; 9-end caps; 10-a first sliding space; 11-a second sliding space; 12-a third sliding space; 13-a first piston; 14-a second piston; 15-connecting sleeves; 16-a bushing; 17-nut; 18-screws; 19-positioning blocks; 20-signal pins; 21-work piece.

Detailed Description

In order to make the technical scheme of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the following specific embodiments.

As shown in fig. 1 to 4, a clamp spring 1, wherein one end of the clamp spring 1 is provided with an external thread 2; one end of the clamp spring 1 far away from the external thread 2 is provided with a plurality of adjacent and evenly distributed attaching petals 3.

Further, the outer diameter of the fitting flap 3 gradually decreases from the end far from the external thread 2 to the end near to the external thread 2.

In this embodiment, the outer circles of the plurality of engaging petals 3 are substantially tapered, and have a long outer diameter at one end and a short outer diameter at the other end. Therefore, the deformation capability is provided between the fitting flap 3 and the clamp spring 1, so that when the clamp spring slides in the cylindrical object with the determined diameter length, if the clamp spring slides towards the end of the external thread 2, the conical surface of the clamp spring 1 is extruded to deform, otherwise, the fitting flap 3 is released and opened.

In the present embodiment, the clip spring 1 is applied to a jig, forming a compact jig for clamping a shaft-like workpiece 21.

In particular, the compact clamp comprises an inner cone 4 and a displacement assembly; the inner cone 4 is provided with an inclined plane matched with the fitting petals 3; the displacement assembly is in threaded connection with the clamp spring 1 and is used for driving the clamp spring 1 to move along the axial direction of the inner cone 4, so that a plurality of attached petals 3 are simultaneously opened or closed.

For better use of the present embodiment, it further comprises a seat assembly having a space for accommodating the inner cone 4 and the displacement assembly therein; the inner cone 4 is fixedly arranged in the seat body assembly, and the displacement assembly is movably arranged in the seat body assembly; the seat body assembly is provided with a first medium channel 5 and a second medium channel 6 for introducing media in different directions, so that the displacement assembly generates displacement in different directions relative to the seat body assembly.

In this embodiment, the inner cone 4 is fixedly disposed in the seat assembly, and the displacement assembly is movably disposed in the seat assembly. Therefore, when the workpiece 21 is inserted into the seat body assembly and is positioned at the inner side of the clamp spring 1, the clamp spring 1 is carried by the displacement assembly to move relative to the inner cone 4, so that the displacement assembly moves towards the right end, and the joint flap 3 is extruded due to the fact that the diameter of the inclined plane is reduced, and therefore the joint flap 3 is folded, and the clamping purpose is achieved; conversely, if the displacement assembly moves toward the left end, the diameter of the inclined surface increases, and the engaging flap 3 is released and opened, thereby preventing the work 21 from loosening.

In this embodiment, the movement of the displacement assembly is achieved by movement of a medium, which may be liquid or gaseous in general, which enters the housing assembly through the first medium channel 5 or the second medium channel 6, thereby achieving the purpose of driving the displacement assembly in different directions.

Specifically, the seat body component comprises a base 7, an intermediate body 8 and an end cover 9; the base 7 has a short diameter portion; the intermediate body 8 is sleeved on the short-diameter part; one end of the end cover 9 is sleeved outside one end of the inner cone 4 with the inclined plane, and the other end of the end cover cooperates with the intermediate body 8 to clamp one end of the inner cone 4 far away from the inclined plane between the end cover 9 and the intermediate body 8; a first sliding space 10 is formed between the intermediate body 8 and the base 7, a second sliding space 11 is formed between the end cover 9 and the inner cone 4, and a third sliding space 12 is formed between the inner cone 4 and the intermediate body 8; the first medium channel 5 and the second medium channel 6 are communicated with the first sliding space 10 and/or the second sliding space 11; the displacement assembly has a sliding capability in the first sliding space 10, the second sliding space 11 and the third sliding space 12.

In this embodiment, the end cover 9, the inner cone 4, the intermediate body 8, and the base 7 are connected in this order from left to right. Wherein, end cover 9 also overlaps the one end that is far away from external screw thread 2 of interior cone 4, and midbody 8 also connects at the short diameter end of base 7.

Therefore, the end cover 9, the inner cone 4, the intermediate body 8 and the base 7 are connected through the fixing pieces to form a whole body so as to accommodate the installation displacement assembly, and on the basis, the sealing requirement is realized by the sealing rings, so that the medium leakage caused by the medium flowing in is avoided.

On the basis of the integral structure, the displacement assembly comprises a first piston 13, a second piston 14, a connecting sleeve 15 and a fixing assembly; the first piston 13 is sleeved on the short-diameter part and is positioned in the first sliding space 10; the second piston 14 is sleeved at one end of the inner cone 4 provided with an inclined plane and is positioned in the second sliding space 11; the connecting sleeve 15 is provided with a threaded part and a connecting part, the threaded part is connected with the clamp spring 1, and the connecting part is positioned in the third sliding space 12; one end of the fixing assembly is connected with the first piston 13, and the other end passes through the connecting part and is connected with the second piston 14.

Specifically, in the use, first piston 13 and second piston 14 pass through fixed subassembly and connect as an organic wholely, make jump ring 1 and adapter sleeve 15 threaded connection to make the laminating lamella 3 of jump ring 1 cooperate with the slope of inner cone 4.

The first medium channel 5 communicates with the first sliding space 10 and the second sliding space 11, and the second medium channel 6 also communicates with the second sliding space 11.

The liquid outlet of the first medium channel 5 is positioned on the left side in the first sliding space 10 and the second sliding space 11, and the liquid outlet of the second medium channel 6 is positioned on the right side in the second sliding space 11.

At this time, medium is introduced into the first medium channel 5, and the medium pushes the first piston 13 and the second piston 14 to move to the right, so that the clamp spring 1 is pulled to move to the right, and the inner cone 4 forces the closing flap 3 to be closed, so that the workpiece 21 is clamped; otherwise, medium is introduced from the second medium channel 6, so that the clamp spring 1 moves leftwards, the attaching valve 3 opens, and the workpiece 21 can be loosened.

On the basis, in a proper structure, more pistons can be arranged to double the clamping force, so that the working conditions of small volume and large clamping force are achieved.

If more pistons are added, the following conditions should be satisfied:

1. when the workpiece 21 requires a large load and high rotation speed processing, the clamping force needs to be increased;

2. the processing equipment cannot use clamps with larger diameters to meet the production requirement due to the limitation of the internal space;

3. the pressure of the driving medium cannot be changed, resulting in an inability to increase the clamping force.

Accordingly, in some embodiments, clamping may also be achieved with a single piston.

In this embodiment, only the first piston 13 moves in the first sliding space 10, but of course, for the purpose of driving, there is also a connection moving in the third sliding space 12. It is far from the same double piston, so that no further description is made.

For better use of the present embodiment, the fixing assembly comprises a bushing 16, a nut 17 and a screw 18; the bushing 16 passes through the connecting portion, one end of the bushing is in contact with the first piston 13, and the other end of the bushing is in contact with the second piston 14; the nut 17 is located at the second piston 14; one end of the screw 18 extends from the first piston 13 into the bushing 16, passes through the second piston 14 and is connected to the nut 17.

The first piston 13 and the second piston 14 are thus integrated by the bushing 16, the nut 17 and the screw 18, so that the drive of the clamping spring 1 is better achieved when the medium is forced.

In this embodiment, the positioning block 19 is further included, where the positioning block 19 is disposed at an end of the inner cone 4 away from the base 7, and is used for positioning a workpiece 21 inserted into the fixture. The positioning block 19 can be used for inserting and positioning the workpiece 21, so that the workpiece 21 is prevented from being too short in extending length to be gripped.

Furthermore, in some embodiments, the device further comprises a signal pin 20, wherein a detection end of the signal pin 20 extends into the first sliding space 10 from the base 7, so as to detect the displacement condition of the displacement assembly in the first sliding space 10.

The signal pin 20 can provide a detection signal when the displacement assembly moves, so that a user can know the gripping condition of the clamp spring 1 on the workpiece 21 according to the moving condition of the displacement assembly.

As shown in fig. 5 to 8, in some embodiments, the middle part of the clip spring 1 is provided with a plurality of evenly distributed attaching petals 3 at intervals, which are different from the above embodiments.

At this time, a part of the position of the fitting flap 3 cannot be deformed relative to the clamp spring 1, and the part can be used for positioning. At this time, the clamping position of the clamp spring 1 is located in the middle, so that clamping can be achieved by using the clamp spring 1 when the clamping position is allowed to be far from the positioning surface by the workpiece 21.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the utility model, and the scope of the utility model should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the utility model, and such modifications and adaptations are intended to be comprehended within the scope of the utility model.

Claims (10)

1. The clamp spring is characterized in that one end of the clamp spring is provided with an external thread;

the middle part of the clamp spring is provided with a plurality of attaching petals which are uniformly distributed at intervals; or (b)

One end of the clamp spring, which is far away from the external thread, is provided with a plurality of adjacent and evenly distributed attaching petals.

2. A circlip according to claim 1 wherein the outer diameter of the abutment flap tapers from the end remote from the external thread to the end adjacent the external thread.

3. A compact clamp comprising a clamp spring according to claim 2.

4. A compact clamp as defined in claim 3, further comprising:

the inner cone is provided with an inclined plane matched with the fitting valve; and

the displacement assembly is in threaded connection with the clamp spring and is used for driving the clamp spring to move along the axial direction of the inner cone, so that a plurality of fitting petals can be opened or closed simultaneously.

5. A compact clamp as defined in claim 4, further comprising:

a housing assembly having a space for receiving the inner cone and the displacement assembly therein;

the inner cone is fixedly arranged in the seat body assembly, and the displacement assembly is movably arranged in the seat body assembly;

the seat body component is provided with a first medium channel and a second medium channel which are used for leading in mediums towards different directions, so that the displacement component generates displacements relative to the seat body component in different directions.

6. The compact clamp of claim 5, wherein said housing assembly comprises:

a base having a short diameter portion;

the intermediate body is sleeved on the short-diameter part; and

the end cover is sleeved at one end of the end cover, is arranged outside one end of the inner cone, which is provided with the inclined surface, and the other end of the end cover cooperates with the intermediate body, so that one end of the inner cone, which is far away from the inclined surface, is clamped between the end cover and the intermediate body;

a first sliding space is formed between the intermediate body and the base, and a third sliding space is formed between the inner cone body and the intermediate body;

the first medium channel and the second medium channel are both communicated to the first sliding space;

the displacement assembly has sliding capacity in the first sliding space and the third sliding space.

7. The compact clamp of claim 6, wherein said displacement assembly comprises:

the first piston is sleeved on the short-diameter part and is positioned in the first sliding space;

the connecting sleeve is provided with a threaded part and a connecting part, the threaded part is connected with the clamp spring, and the connecting part is positioned in the third sliding space; and

and one end of the fixing component is connected with the first piston, and the other end of the fixing component is connected with the connecting part.

8. The compact clamp of claim 7, wherein a second sliding space is formed between said end cap and said inner cone; the first medium channel and the second medium channel are communicated with the first sliding space and/or the second sliding space; the displacement assembly also has a sliding capability within the second sliding space.

9. The compact clamp of claim 8, wherein said displacement assembly further comprises:

the second piston is sleeved at one end of the inner cone, which is provided with an inclined plane, and is positioned in the second sliding space;

one end of the fixing component is connected with the first piston, and the other end of the fixing component penetrates through the connecting part and is connected with the second piston.

10. The compact clamp of claim 9, wherein said securing assembly comprises:

a bush passing through the connection portion, one end of the bush being in contact with the first piston, and the other end being in contact with the second piston;

a nut located at the second piston; and

and one end of the screw extends into the bushing from the first piston, passes through the second piston and is connected with the nut.